Some are already trying to figure out when ICANN will start accepting submissions for the inevitable next round of keyword gTLDs.
http://www.circleid.com/posts/20170207_next_gtld_round_a_seven_year_itch/ [circleid.com]
Next gTLD Round - A Seven Year Itch?
On 12 January 2012, ICANN opened the first application window for new gTLDs, which ultimately resulted in 1,930 applications. It was almost another two years before we saw the first TLDs delegated, but once we got over the initial teething problems a regular flow of delegations followed. In the latter half of 2016, we started to see some real inroads being made by the next generation of TLDs, and predictions for 2017 are extremely positive. There is no doubt that there is already demand for the next application window for new gTLDs to open, and as the only organization that can respond to that demand, ICANN has a responsibility to provide some predictability as to when that will happen.
Deadlines drive action, so what we all need is a date. If there is indeed going to be a next round, then lets draw a line in the sand so we can all work toward that deadline.
I have heard rumors of as early as 2018. The author of this article guesses 2019. Some ICANN reps apparently suggest 2020. When will the next round start?